反応 #53318

反応方程式

glycine ethyl ester hydrochloride

bromoacetaldehyde diethyl acetal

cesium carbonate

sodium iodide

hydrochloric acid

→

title compound

ethyl 2-[(2,2-diethoxyethyl)amino]acetate

溶媒

N,N-dimethylformamide

反応条件

後処理

1. 1
   洗浄washed with ethyl acetate
2. 2
   抽出extracted with methylene chloride
3. 3
   乾燥The organic layer was dried over anhydrous sodium sulfate
4. 4
   workup.DISTILLATIONthe solvent was distilled off under reduced pressure

実験手順

To a suspension of the glycine ethyl ester hydrochloride (1.00 g) and bromoacetaldehyde diethyl acetal (1.08 ml) in N,N-dimethylformamide (30 ml), were added cesium carbonate (4.67 g) and sodium iodide (107 mg) and the mixture was stirred at 100° C. for 4 hours. The reaction mixture was adjusted to pH 2 with 1N hydrochloric acid and washed with ethyl acetate. The aqueous layer was adjusted to pH 11 with 1N aqueous solution of sodium hydroxide and extracted with methylene chloride. The organic layer was dried over anhydrous sodium sulfate and thereafter the solvent was distilled off under reduced pressure to obtain the title compound (860 mg).

出典